What I've never understood is, how could any third shooter - if there was one - manage to escape from the compound after having killed the other two hitmen?
Didn't we see a car screeching away from the compound's gate just as the guards were closing it?
As for Fredo: he seems to be the last man standing for the murder of the shooters. And, given his treachery....
But, like Oli, I doubt he had the strength and the cunning to do it by himself.
